Congratulations, world. We’ve done it. Since passing the Clean Air Act in the 1970s, we’ve reduced cancer-causing particulate emissions from our cars and other sources dramatically, a change that has added years to our lives.
That’s the good news. The bad news is that we can now spend more time focusing on the remaining sources, including some unexpected ones. In an EV era, tires are becoming the greatest emitters of particulate matter, and as we’ve seen, whether it’s the micr...